Partial fix for PR testsuite/1456. * gdb.cp/ambiguous.exp: Replace reference to gcc_compiled with call to test_compiler_info. * gdb.cp/ctti.exp: Likewise. * gdb.cp/derivation.exp: Likewise. * gdb.cp/member-ptr.exp: Likewise. * gdb.cp/virtfunc.exp (test_virtual_calls): Remove unused reference to gcc_compiled.